./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 09:29:35,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:29:35,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:29:35,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:29:35,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:29:35,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:29:35,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:29:35,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:29:35,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:29:35,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:29:35,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:29:35,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:29:35,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:29:35,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:29:35,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:29:35,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:29:35,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:29:35,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:29:35,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:29:35,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:29:35,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:29:35,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:29:35,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:29:35,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:29:35,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:29:35,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:29:35,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:29:35,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:29:35,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:29:35,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:29:35,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:29:35,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:29:35,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:29:35,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:29:35,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:29:35,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:29:35,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:29:35,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:29:35,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:29:35,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:29:35,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:29:35,829 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:29:35,845 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:29:35,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:29:35,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:29:35,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:29:35,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:29:35,846 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:29:35,846 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:29:35,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:29:35,847 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:29:35,847 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:29:35,847 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:29:35,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:29:35,847 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:29:35,847 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:29:35,848 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:29:35,848 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:29:35,848 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:29:35,848 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:29:35,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:29:35,849 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:29:35,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:29:35,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:29:35,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:29:35,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:29:35,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:29:35,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:29:35,850 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:29:35,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:29:35,850 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:29:35,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:29:35,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:29:35,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:29:35,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:29:35,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:29:35,851 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:29:35,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:29:35,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:29:35,852 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:29:35,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:29:35,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:29:35,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:29:35,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e [2022-12-14 09:29:36,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:29:36,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:29:36,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:29:36,037 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:29:36,037 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:29:36,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2018/Problem11.c [2022-12-14 09:29:38,595 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:29:38,898 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:29:38,899 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/sv-benchmarks/c/eca-rers2018/Problem11.c [2022-12-14 09:29:38,914 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/data/b14afdcfc/44f58c57e17044f6b49100345dba0c3f/FLAGca660d25c [2022-12-14 09:29:38,925 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/data/b14afdcfc/44f58c57e17044f6b49100345dba0c3f [2022-12-14 09:29:38,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:29:38,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:29:38,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:29:38,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:29:38,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:29:38,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:29:38" (1/1) ... [2022-12-14 09:29:38,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184bc8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:38, skipping insertion in model container [2022-12-14 09:29:38,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:29:38" (1/1) ... [2022-12-14 09:29:38,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:29:38,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:29:39,093 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2022-12-14 09:29:39,098 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2022-12-14 09:29:39,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:29:39,633 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:29:39,641 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2022-12-14 09:29:39,642 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2022-12-14 09:29:39,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:29:39,777 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:29:39,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39 WrapperNode [2022-12-14 09:29:39,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:29:39,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:29:39,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:29:39,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:29:39,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (1/1) ... [2022-12-14 09:29:39,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (1/1) ... [2022-12-14 09:29:39,926 INFO L138 Inliner]: procedures = 286, calls = 252, calls flagged for inlining = 148, calls inlined = 148, statements flattened = 1876 [2022-12-14 09:29:39,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:29:39,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:29:39,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:29:39,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:29:39,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (1/1) ... [2022-12-14 09:29:39,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (1/1) ... [2022-12-14 09:29:39,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (1/1) ... [2022-12-14 09:29:39,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (1/1) ... [2022-12-14 09:29:39,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (1/1) ... [2022-12-14 09:29:40,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (1/1) ... [2022-12-14 09:29:40,026 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (1/1) ... [2022-12-14 09:29:40,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (1/1) ... [2022-12-14 09:29:40,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:29:40,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:29:40,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:29:40,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:29:40,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (1/1) ... [2022-12-14 09:29:40,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:29:40,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:29:40,087 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:29:40,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:29:40,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:29:40,122 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-12-14 09:29:40,122 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-12-14 09:29:40,122 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-12-14 09:29:40,122 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-12-14 09:29:40,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:29:40,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:29:40,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:29:40,253 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:29:40,254 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:30:31,884 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:30:41,954 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:30:41,954 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 09:30:41,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:30:41 BoogieIcfgContainer [2022-12-14 09:30:41,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:30:41,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:30:41,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:30:41,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:30:41,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:29:38" (1/3) ... [2022-12-14 09:30:41,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137650fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:30:41, skipping insertion in model container [2022-12-14 09:30:41,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:29:39" (2/3) ... [2022-12-14 09:30:41,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137650fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:30:41, skipping insertion in model container [2022-12-14 09:30:41,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:30:41" (3/3) ... [2022-12-14 09:30:41,963 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11.c [2022-12-14 09:30:41,977 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:30:41,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 09:30:42,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:30:42,022 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5e222e6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:30:42,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 09:30:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 207 states have (on average 1.502415458937198) internal successors, (311), 209 states have internal predecessors, (311), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-12-14 09:30:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:30:42,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:42,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:30:42,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:30:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:42,037 INFO L85 PathProgramCache]: Analyzing trace with hash 504774637, now seen corresponding path program 1 times [2022-12-14 09:30:42,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:30:42,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222424824] [2022-12-14 09:30:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:42,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:30:42,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:30:42,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362136370] [2022-12-14 09:30:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:42,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:30:42,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:30:42,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:30:42,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:30:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:30:43,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 09:30:43,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:40:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:40:58,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:40:58,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:40:58,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222424824] [2022-12-14 09:40:58,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:40:58,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362136370] [2022-12-14 09:40:58,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362136370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:40:58,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:40:58,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:40:58,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334354850] [2022-12-14 09:40:58,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:40:58,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:40:58,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:40:59,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:40:59,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:40:59,011 INFO L87 Difference]: Start difference. First operand has 312 states, 207 states have (on average 1.502415458937198) internal successors, (311), 209 states have internal predecessors, (311), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:41:01,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 09:41:04,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 09:41:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:41:04,089 INFO L93 Difference]: Finished difference Result 730 states and 1328 transitions. [2022-12-14 09:41:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:41:04,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:41:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:41:04,099 INFO L225 Difference]: With dead ends: 730 [2022-12-14 09:41:04,099 INFO L226 Difference]: Without dead ends: 413 [2022-12-14 09:41:04,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:41:04,104 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 300 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:41:04,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 604 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 315 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-12-14 09:41:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-12-14 09:41:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 256. [2022-12-14 09:41:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 154 states have (on average 1.922077922077922) internal successors, (296), 253 states have internal predecessors, (296), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:41:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 396 transitions. [2022-12-14 09:41:04,141 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 396 transitions. Word has length 6 [2022-12-14 09:41:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:41:04,141 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 396 transitions. [2022-12-14 09:41:04,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:41:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 396 transitions. [2022-12-14 09:41:04,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:41:04,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:41:04,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:41:04,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:41:04,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:41:04,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:41:04,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:41:04,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1532572234, now seen corresponding path program 1 times [2022-12-14 09:41:04,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:41:04,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551248389] [2022-12-14 09:41:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:41:04,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:41:04,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:41:04,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178762930] [2022-12-14 09:41:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:41:04,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:41:04,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:41:04,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:41:04,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84b48b5f-c718-47d6-a47a-0b3dab2be58b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:41:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:41:05,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 09:41:05,669 INFO L286 TraceCheckSpWp]: Computing forward predicates...